73
73

Sep 17, 2013
09/13

by
C. Bona; C. Bona-Casas

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A set of energy-momentum constraint-preserving boundary conditions is proposed for the first-order Z4 case. The stability of a simple numerical implementation is tested in the linear regime (robust stability test), both with the standard corner and vertex treatment and with a modified finite-differences stencil for boundary points which avoids corners and vertices even in cartesian-like grids. Moreover, the proposed boundary conditions are tested in a strong field scenario, the Gowdy waves...

Source: http://arxiv.org/abs/1003.3328v2

114
114

Oct 25, 2014
10/14

by
Bona, Giovanni

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26
26

Sep 18, 2013
09/13

by
Miklos Bona

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Numerical evidence suggests that certain permutation patterns of length k are easier to avoid than any other patterns of that same length. We prove that these patterns are avoided by no more than (2.25k^2)^n permutations of length n. In light of this, we conjecture that no pattern of length k is avoided by more than that many permutations of length n.

Source: http://arxiv.org/abs/1209.2404v1

37
37

Aug 10, 2016
08/16

by
Giovanni Bona

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Topic: bub_upload

Source: http://books.google.com/books?id=plm1HPWv2FYC&hl=&source=gbs_api

34
34

Sep 18, 2013
09/13

by
Miklos Bona

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We examine the poset $P$ of 132-avoiding $n$-permutations ordered by descents. We show that this poset is the "coarsening" of the well-studied poset $Q$ of noncrossing partitions . In other words, if $x

Source: http://arxiv.org/abs/math/9811067v1

26
26

Sep 20, 2013
09/13

by
Pavel Bona

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The topology of the embedding of the coadjoint orbits of the unitary group U(H) of an in-finite dimensional complex Hilbert space H, as canonically determined subsets of the B-space T_s of symmetric trace class operators, is investigated. The space T_s is identified with the B-space predual of the Lie-algebra L(H)_s of the Lie group U(H). It is proved, that orbits con-sisting of symmetric operators with finite range are (regularly embedded) closed submanifolds of T_s. An alternative method of...

Source: http://arxiv.org/abs/math-ph/0301007v3

33
33

Sep 21, 2013
09/13

by
Miklos Bona

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We use Janson's dependency criterion to prove that the distribution of $d$-descents of permutations of length $n$ converge to a normal distribution as $n$ goes to infinity. We show that this remains true even if $d$ is allowed to grow with $n$, up to a certain degree.

Source: http://arxiv.org/abs/0709.4483v1

75
75

Nov 26, 2014
11/14

by
Giovanni Bona

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Topic: bub_upload

Source: http://books.google.com/books?id=FO70oqkNWycC&hl=&source=gbs_api

28
28

Sep 20, 2013
09/13

by
Miklos Bona

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We prove generalized versions of some conjectures of Joel Lewis on the number of alternating permutations avoiding certain patterns. Our main tool is the perhaps surprising observation that a classic bijection on pattern avoiding permutations often preserves the alternating property.

Source: http://arxiv.org/abs/1205.1778v1

124
124

Nov 22, 2014
11/14

by
Giovanni Bona

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Topic: bub_upload

Source: http://books.google.com/books?id=dqnJ0OFOgfcC&hl=&source=gbs_api

13
13

Dec 13, 2013
12/13

by
Damien Bona

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Topic: Academy Awards (Motion pictures)

47
47

Jul 26, 2016
07/16

by
Giovanni Bona

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comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=h9pg3c7ggjkC&hl=&source=gbs_api

11
11

Jun 26, 2018
06/18

by
Richard Bona

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Tracklist: 1. Engingilaye & Te Dikalo 2. Kivu & Suninga 3. Kalabancoro 4. Samaouma 5. O Sen Sen Sen 6. Indiscretions & Please Don't Stop 7. Djombwe & I Wish & Trains 8. Ekwa Mwato

Source: CD

197
197

Nov 20, 2014
11/14

by
Giovanni Bona

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comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=ChcvTNqNi-kC&hl=&source=gbs_api

75
75

Oct 13, 2010
10/10

by
Bona, Pasquale

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comment 0

25
25

Sep 19, 2013
09/13

by
Miklós Bóna

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We give a combinatorial proof of the result of Hetyei and Reiner that there are exactly $n!/3$ permutations of length $n$ in the minmax tree representation of which the $i$th node is a leaf. We also prove the new result that the number of $n$-permutations in which this node has one child is $n!/3$ as well, implying that the same holds for those in which this node has two children.

Source: http://arxiv.org/abs/math/9703209v1

22
22

Sep 19, 2013
09/13

by
Miklos Bona

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We study Stirling permutations defined by Gessel and Stanley. We prove that their generating function according to the number of descents has real roots only. We use that fact to prove that the distribution of these descents, and other, equidistributed statistics on these objects converge to a normal distribution.

Source: http://arxiv.org/abs/0708.3223v2

17
17

Jun 20, 2014
06/14

by
Damien Bona

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Topic: Motion pictures -- Casting -- United States.

32
32

Jul 22, 2016
07/16

by
Giovanni Bona

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Topic: bub_upload

Source: http://books.google.com/books?id=e3aoJ6D07MsC&hl=&source=gbs_api

7
7.0

Jan 21, 2018
01/18

by
Bona Head

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Tracklist: 1. Overture (The Traveller) 2. Fog 3. Kites (Lost In Thought) 4. Momentary Visions 5. Before To The Mirrors 6. Talking To Myself 7. September Shock 8. M. Pity 9. Miss Serendipity 10. Kepler (The Reflection)

Source: CD

40
40

Sep 20, 2013
09/13

by
Miklos Bona

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We prove that the number of 1324-avoiding permutations of length n is less than (7+4\sqrt{3})^n.

Source: http://arxiv.org/abs/1207.2379v1

25
25

Jul 19, 2016
07/16

by
Giovanni Bona

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Topic: bub_upload

Source: http://books.google.com/books?id=CcpHplAbCtcC&hl=&source=gbs_api

Topics: Duets, For clarinet, piano, Scores featuring the clarinet, Scores featuring the piano, For 2 players

Source: http://imslp.org/wiki/La_semaine_musicale_(Bona,_Pasquale)

13
13

Jun 26, 2018
06/18

by
Richard Bona

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Oversize Artwork Tracklist: 1. Bonatology (Incantation) 2. Kalabancoro 3. Sona Mama 4. Painting A Wish 5. Engingilaye 6. Dina Lam (Incantation) 7. Balemba Na Bwemba 8. Muto Bye Bye 9. Bona Petit 10. Couscous 11. Playground

Source: CD

360
360

Dec 24, 2014
12/14

by
Giovanni Bona

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eye 360

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comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=wRfv1xRKH7AC&hl=&source=gbs_api

0
0.0

Jun 30, 2018
06/18

by
Miklós Bóna

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Refining an existing counting argument, we provide an improved upper bound for the number of 1324-avoiding permutations of a given length.

Topics: Mathematics, Combinatorics

Source: http://arxiv.org/abs/1404.4033

10
10.0

Jun 26, 2018
06/18

by
Richard Bona

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No barcode Tracklist: 1. Invocation (A Prophecy) 2. Bisso Baba (Always together) 3. Suninga (When Will I Ever See You) 4. Ekwa Mwato (Affirmation of the Spirit) 5. Sweet Mary (Everyone Has a Choice) 6. Reverence (The Story of a Miracle) 7. Te Misea (A Scream to Save the Planet) 8. Muntula Moto (The Benediction of a long Life) 9. Laka Mba (Plea for Forgiveness) 10. Ngad'a Ndutu (Widow's Dance - Celebration Of A New Life) 11. Esoka (Trust Your Heart) 12. Mbanga Kumba (Two cities, One Train)

Source: CD

8
8.0

Jun 27, 2018
06/18

by
Richard Bona

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Tracklist: 1. Engingilaye & Te Dikalo 2. Kivu & Suninga 3. Kalabancoro 4. Samaouma 5. O Sen Sen Sen 6. Indiscretions & Please Don't Stop 7. Djombwe & I Wish & Trains 8. Te Dikalo

Source: CD

152
152

Jul 30, 2016
07/16

by
Giovanni Bona

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favorite 0

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comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=JJwNLtdxSL8C&hl=&source=gbs_api

55
55

Sep 18, 2013
09/13

by
Miklos Bona

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We prove that the generating polynomials of partitions of an $n$-element set into non-singleton blocks, counted by the number of blocks, have real roots only. We apply this information to find the most likely number of blocks. As another application of the real zeros result, we prove that the number of blocks is normally distributed in such partitions. We present a quick way to prove the corresponding statement for cycles of permutations in which each cycle is longer than a given integer $r$.

Source: http://arxiv.org/abs/0705.2734v2

110
110

Jan 24, 2016
01/16

by
Bartolomeo Bona

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Topic: bub_upload

Source: http://books.google.com/books?id=9dKhPBs8EyMC&hl=&source=gbs_api

30
30

Sep 22, 2013
09/13

by
Marcella Bona

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Using 22.7M BBbar events collected with the BABAR detector at SLAC, we present preliminary measurements of the branching fractions for charmless hadronic decays of B mesons into two-body, quasi two-body and three-body final states with pions, kaons, and rho and a0 resonances. In the search for exclusive $B^0 \to \pi^+\pi^-\pi^0$, we measure ${\cal B}(B^0 \to \rho^{\pm}(770)\pi^{\mp})=(28.9\pm5.4\pm4.3) \times 10^{-6}$, together with the relative asymmetry ${\cal A}_{\rm phys} = -0.04 \pm 0.18...

Source: http://arxiv.org/abs/hep-ex/0111017v1

Topic: bub_upload

Source: http://books.google.com/books?id=akPAGGfmqGEC&hl=&source=gbs_api

31
31

Sep 22, 2013
09/13

by
Pavel Bona

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This paper contains a criticism of the article: Ch. Simon, V. Buzek and N. Gisin: ``No-Signaling Condition and Quantum Dynamics'', Phys. Rev. Lett. 87 (2001) 170405, containing a proposal of adoption into quantum mechanics (QM) a new basic axiom. This axiom was declared to imply linearity of time evolution in QM on the basis of kinematic assumptions only. It is shown why, under the considered conditions, the axiom called ``no-signaling condition'' is not effective.

Source: http://arxiv.org/abs/quant-ph/0201002v3

57
57

Jul 20, 2013
07/13

by
Miklós Bóna

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Solving the first nonmonotonic, longer-than-three instance of a classic enumeration problem, we obtain the generating function $H(x)$ of all 1342-avoiding permutations of length $n$ as well as an {\em exact} formula for their number $S_n(1342)$. While achieving this, we bijectively prove that the number of indecomposable 1342-avoiding permutations of length $n$ equals that of labeled plane trees of a certain type on $n$ vertices recently enumerated by Cori, Jacquard and Schaeffer, which is in...

Source: http://arxiv.org/abs/math/9702223v1

243
243

Oct 25, 2014
10/14

by
Bona, Giovanni

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4º. [24], 534, [16] p.

Topic: De divina psalmodia, eiusque causis, mysteriis, et disciplinis, ...

101
101

Aug 18, 2016
08/16

by
Giovanni Bona

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comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=U9FElURod20C&hl=&source=gbs_api

25
25

Sep 23, 2013
09/13

by
Miklos Bona

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We prove that the total number $S_{n,132}(q)$ of copies of the pattern $q$ in all 132-avoiding permutations of length $n$ is the same for $q=231$, $q=312$, or $q=213$. We provide a combinatorial proof for this unexpected threefold symmetry. We then significantly generalize this result to show an exponential number of different pairs of patterns $q$ and $q'$ of length $k$ for which $S_{n,132}(q)=S_{n,132}(q')$ and the equality is non-trivial.

Source: http://arxiv.org/abs/1202.2023v1

108
108

Jul 20, 2013
07/13

by
Miklos Bona

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We provide bijective proofs of two classic identities that are very simple to prove using generating functions, but surprisingly difficult to prove combinatorially. The problem of finding a bijective proof for the first identity was first raised in the 1930s. The second, more involved identity takes the first one a step further.

Source: http://arxiv.org/abs/1203.3264v1

55
55

Aug 11, 2016
08/16

by
Giovanni Bona

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Topic: bub_upload

Source: http://books.google.com/books?id=qCCpitzm3PoC&hl=&source=gbs_api

81
81

Aug 20, 2016
08/16

by
Giovanni Bona

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eye 81

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favorite 0

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comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=UTSZByb9av4C&hl=&source=gbs_api

168
168

Aug 4, 2016
08/16

by
Giovanni Bona

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eye 168

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favorite 0

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comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=mJFAfRuJOVEC&hl=&source=gbs_api

90
90

Jul 31, 2016
07/16

by
Giovanni Bona

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eye 90

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favorite 0

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comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=kj8sm5N0tD4C&hl=&source=gbs_api

69
69

Jul 20, 2013
07/13

by
Miklos Bona

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Let $S$ be a finite set of positive integers with largest element $m$. Let us randomly select a composition $a$ of the integer $n$ with parts in $S$, and let $m(a)$ be the multiplicity of $m$ as a part of $a$. Let $0\leq r

Source: http://arxiv.org/abs/math/0609845v1

97
97

Jul 20, 2013
07/13

by
Pavel Bona

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Proposals for nonlinear extenstions of quantum mechanics are discussed. Two different concepts of "mixed state" for any nonlinear version of quantum theory are introduced: (i) >genuine mixture < corresponds to operational "mixing" of different ensembles, and (ii) a mixture described by single density matrix without having a canonical operational possibility to pick out its specific convex decomposition is called here an >elementary mixture

Source: http://arxiv.org/abs/quant-ph/9910011v1

97
97

Jul 20, 2013
07/13

by
Pavel Bona

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It is shown how nonlinear versions of quantum mechanics can be refolmulated in terms of a (linear) C*-algebraic theory. Then also their symmetries are described as automorphisms of the correspondong C*-algebra. The requirement of "conservation of transition probabilities" is discussed.

Source: http://arxiv.org/abs/quant-ph/9910012v1

124
124

Feb 24, 2015
02/15

by
Giovanni Bona

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Topic: bub_upload

Source: http://books.google.com/books?id=jXk9AAAAcAAJ&hl=&source=gbs_api

144
144

Dec 13, 2014
12/14

by
Giovanni Bona

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eye 144

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favorite 0

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comment 0

Topic: bub_upload

Source: http://books.google.com/books?id=Pg6MrFNb9S4C&hl=&source=gbs_api

54
54

Sep 18, 2013
09/13

by
Miklos Bona

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We consider pattern containment and avoidance with a very tight definition that was used first by Riordan more than 60 years ago. Using this definition, we prove the monotone pattern is easier to avoid than almost any other pattern of the same length. We also show that with this definition, almost all patterns of length $k$ are avoided by the same number of permutations of length $n$. The corresponding statements are not known to be true for more relaxed definitions of pattern containment. This...

Source: http://arxiv.org/abs/0704.1489v1

38
38

Sep 21, 2013
09/13

by
Miklos Bona

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We prove that the number of copies of any given permutation pattern $q$ has an asymptotically normal distribution in random permutations.

Source: http://arxiv.org/abs/0712.2792v1